| 滇西南昌宁—孟连带和澜沧江带古特提斯多岛洋构造演化 |
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| 引用本文： | 刘本培,冯庆来,方念乔,贾进华,何馥香.滇西南昌宁—孟连带和澜沧江带古特提斯多岛洋构造演化[J].地球科学,1993(5). |
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| 作者姓名： | 刘本培 冯庆来 方念乔 贾进华 何馥香 |
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| 作者单位： | 中国地质大学 北京
(刘本培，冯庆来，方念乔，贾进华)，中国地质大学 北京(何馥香) |
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| 摘 要： | 昌宁—孟连带位于保山—耿马和思茅一临沧地块之间,保存有多种缝合带记录和罕见的泥盆纪至中三叠世连续洋盆沉积序列,代表古特提斯多岛洋主支部位,临沧地块很可能是一个亲冈瓦纳的外来地体,晚二叠世前增生到思茅地块西缘。因此,澜沧江带和昌宁—孟连带晚二叠世前属于同一个洋盆,向南与泰国北部难河—程逸缝合带连接。古特提斯的最后封闭发生于晚印支期,以后又遭受新特提斯阶段喜马拉雅期构造运动的强烈影响。
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| 关 键 词： | 古特提斯 构造演化 昌宁-孟连带 澜沧江带 临沧亲冈瓦纳地体 滇西南 |
TECTONIC EVOLUTION OF PALAEO-TETHYS POLY-ISLAND-OCEAN IN CHANGNING-MENGLIAN AND LANCANGJIANG BELTS,SOUTHWESTERN YUNNAN,CHINA |
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| Liu Benpei Feng Qinglai Fang Nianqiao,Jia Jinhua He Fuxiang.TECTONIC EVOLUTION OF PALAEO-TETHYS POLY-ISLAND-OCEAN IN CHANGNING-MENGLIAN AND LANCANGJIANG BELTS,SOUTHWESTERN YUNNAN,CHINA[J].Earth Science-Journal of China University of Geosciences,1993(5). |
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| Authors: | Liu Benpei Feng Qinglai Fang Nianqiao Jia Jinhua He Fuxiang |
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| Abstract: | The Changning-Menglian belt,located between the Baoshan-Gengma and Simao-Lin-cang massives in Southwestern Yunnan,preserves the complete record of a suture zone and the most continuous sequence of oceanic basin, representing the main branch of palaeo-Tethys poly-island-ocean during Devonian to Middle Triassic. The Lincang massif was probably a isolated Gondwana-affinity terrane and accreted to the western margin of Simao massif in Middle Permian. The Lancangjiang belt and Changning-Menglian belt therefore, consisted of a unified ocean which may connected by the Nan-Uttaradit suture of Northern Thailand before Late Permian. It should be pointed out that the palaeo-Tethys had been closed by small massives accretion in Late Indosinian Orogeny , moreover the Himalayan Orogeny of the Neo-Tethys stage had happened strongly in these belts. |
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| Keywords: | palaeo-Tethys tectonic evolution Changning-Menglian belt Lan- cangjiang belt Lincang Gondwana-affinity terrane Southwestern Yunnan |
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